OttLite 515G53 Battery Task Lamp in Black Rechargeable battery provides up to 3 hours of battery use Available in Black or White AC adaptor/charger included (can use while plugged in) Includes energy efficient 13-Watt tube -rated to last up to 10,000 hours Max. Height: 19.00-Inch Min Height: 11.50-Inch Base Diameter: 4.00 Inch